Genomic signatures associated with the evolutionary loss of egg yolk in parasitoid wasps

• 成果类型: Article
• 署名作者: Zhao, Xianxin; Liu, Yuanyuan; Yuan, Bo; Cao, Zhichao; Yang, Yi; He, Chun; Chan, Kevin C.; Xiao, Shan; Lin, Haiwei; Fang, Qi; Ye, Gongyin; Ye, Xinhai
• 署名单位: Zhejiang University; Zhejiang University; Xi'an Jiaotong-Liverpool University; Zhejiang University; Zhejiang A&F University; Zhejiang A&F University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-10578
• DOI: 10.1073/pnas.2422292122
• 发表日期: 2025-04-22
• 关键词: pteromalus-puparum hymenoptera; pieris-rapae lepidoptera; molecular characteristics; relaxed selection; protein-synthesis; vitellogenin; gene; insect; divergence; oogenesis

摘要

Trait regression and loss have occurred repeatedly in numerous lineages in response to environmental changes. In parasitoid wasps, a megadiverse group of hymenopteran insects, yolk protein reduction or loss has been observed in many species, likely linked to the transition from ectoparasitism to endoparasitism. However, the genetic basis of this trait and the impact of its loss on genome evolution remain poorly understood. Here, we performed a comparative genomic analysis of 64 hymenopteran insects. The conin four families, involving 23 of the analyzed endoparasitoid species. Whole- genome of Vg receptor gene (VgR) loss, selection, and structural variation in lineages lacking subsequent VgR evolution. Together, these findings reveal the genomic changes underlying a unique trait loss in parasitoid wasps. More broadly, this study enhances our a potential evolutionary trend arising from the availability of an alternative nutrient source for embryonic development.